add external data fields to templates

app/models/template.rb

@@ -4,22 +4,23 @@
 #
 # Table name: templates
 #
-#  id          :bigint           not null, primary key
-#  archived_at :datetime
-#  fields      :text             not null
-#  name        :string           not null
-#  preferences :text             not null
-#  schema      :text             not null
-#  shared_link :boolean          default(FALSE), not null
-#  slug        :string           not null
-#  source      :text             not null
-#  submitters  :text             not null
-#  created_at  :datetime         not null
-#  updated_at  :datetime         not null
-#  account_id  :integer          not null
-#  author_id   :integer          not null
-#  external_id :string
-#  folder_id   :integer          not null
+#  id                   :bigint           not null, primary key
+#  archived_at          :datetime
+#  external_data_fields :string
+#  fields               :text             not null
+#  name                 :string           not null
+#  preferences          :text             not null
+#  schema               :text             not null
+#  shared_link          :boolean          default(FALSE), not null
+#  slug                 :string           not null
+#  source               :text             not null
+#  submitters           :text             not null
+#  created_at           :datetime         not null
+#  updated_at           :datetime         not null
+#  account_id           :integer          not null
+#  author_id            :integer          not null
+#  external_id          :string
+#  folder_id            :integer          not null
 #
 # Indexes
 #
@@ -78,6 +79,12 @@ class Template < ApplicationRecord
     external_id
   end
 
+  def external_data_fields
+    return {} if self[:external_data_fields].blank?
+
+    JSON.parse(self[:external_data_fields])
+  end
+
   private
 
   def maybe_set_default_folder

db/migrate/20250703143236_add_external_data_fields_to_templates.rb

@@ -0,0 +1,5 @@
+class AddExternalDataFieldsToTemplates < ActiveRecord::Migration[8.0]
+  def change
+    add_column :templates, :external_data_fields, :string
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_07_02_204317) do
+ActiveRecord::Schema[8.0].define(version: 2025_07_03_143236) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "btree_gin"
   enable_extension "pg_catalog.plpgsql"
@@ -393,6 +393,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_07_02_204317) do
     t.string "external_id"
     t.text "preferences", null: false
     t.boolean "shared_link", default: false, null: false
+    t.string "external_data_fields"
     t.index ["account_id", "folder_id", "id"], name: "index_templates_on_account_id_and_folder_id_and_id", where: "(archived_at IS NULL)"
     t.index ["account_id", "id"], name: "index_templates_on_account_id_and_id_archived", where: "(archived_at IS NOT NULL)"
     t.index ["account_id"], name: "index_templates_on_account_id"